Collections functions
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http_get_preferred_language()

Description

Use the browser settings to determine the default / preferred language

Parameters

ColumnTypeDefaultDescription
$strict_mode boolean false

Return

string The language string the user may prefer

Location

include/language_functions.php lines 523 to 568

Definition

 
function http_get_preferred_language($strict_mode=false)
    {
    global 
$languages;

    if (empty(
$_SERVER['HTTP_ACCEPT_LANGUAGE']))
        return 
null;

    
$accepted_languages=preg_split('/,\s*/',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
    
$current_lang=false;
    
$current_quality=0;
    
$language_map = array();
    foreach (
$languages as $key => $value)
        
$language_map[strtolower($key)] = $key;

    foreach (
$accepted_languages as $accepted_language)
        {
        
$res=preg_match('/^([a-z]{1,8}(?:-[a-z]{1,8})*)(?:;\s*q=(0(?:\.[0-9]{1,3})?|1(?:\.0{1,3})?))?$/i',$accepted_language,$matches);
        if (!
$res)
            continue;

        
$lang_code=explode('-',$matches[1]);

        
// Use specified quality, if any
        
if (isset($matches[2]))
            
$lang_quality=(float)$matches[2];
        else
            
$lang_quality=1.0;

        while (
count($lang_code))
            {
            
$short=strtolower(join('-'$lang_code));
            if (
array_key_exists($short$language_map) && $lang_quality $current_quality)
                {
                
$current_lang=$language_map[$short];
                
$current_quality=$lang_quality;
                }

            if (
$strict_mode)
                break;

            
array_pop($lang_code);
            }
        }

        return 
$current_lang;
    }

This article was last updated 14th July 2020 03:05 Europe/London time based on the source file dated 7th July 2020 14:31 Europe/London time.